The Potential Perils of Forest Carbon Contracts for Developing Countries: Cases from Africa Journal of Peasant Studies, Vol. 39, No. 2, pp. 551-572 24 Pages Posted: 24 May 2012
Acne in adult women is often hard to treat. One study showed that 80 percent of women prescribed antibiotics for acne receive no benefits from the drugs, Shinkai said. In these cases, the acne may stem from normal hormonal changes, such as those that occur around the menstrual cycle, or from a true hormonal disorder. For many of these women, medications that target hormones, rather than skin bacteria, would provide the most help, Shinkai said.
The cause of acne is not fully understood. Though stress can aggravate acne, it clearly does not cause it. Hormones. Common acne in teenagers starts with an increase in hormone production. During puberty, both boys and girls produce high levels of androgens, the male sex hormones that include testosterone.